Revisiting the sex pheromone of the fall armyworm Spodoptera frugiperda, a new invasive pest in South China
Revisiting the sex pheromone of the fall armyworm Spodoptera frugiperda, a new invasive pest in South China
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重新审视华南新入侵害虫草地贪夜蛾的性信息素
DOI：
10.1111/1744-7917.12956
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发表时间：
2021-10-15
期刊：
影响因子：
4
通讯作者：
Wang, Chen-Zhu
中科院分区：
文献类型：
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作者：
Jiang, Nan-Ji;Mo, Bao-Tong;Wang, Chen-Zhu
草地贪夜蛾（Spodoptera frugiperda）是一种世界性的严重农业害虫，近年来又入侵我国南方.利用性信息素可以准确地监测该虫在田间的种群动态。然而，以往报道的不同地理种群和品系的信息素成分并不一致。在确认S.采用气相色谱-触角电位检测（GC-EAD）、气相色谱-质谱联用（GC-MS）和触角电位（EAG）技术，对云南省草地贪夜蛾（frugiperda）玉米品系雌性信息素腺体提取物中潜在的性信息素成分进行了分析。结果表明，（Z）-9-十四烯醛乙酸酯（Z9 - 14：Ac）、（Z）-11-十六烯基乙酸酯（Z11 - 16：Ac）、（Z）-7-十二烯基乙酸酯（Z7 - 12：Ac）或（E）-7-十二烯基乙酸酯（E7 - 12：Ac）以100：15.8：3.9的比例诱导不同程度的EAD反应：Z9 - 14：Ac引起较强的EAD反应，Z7 - 12：Ac或E7 - 12：Ac引起较小但明显的EAD反应，而Z11 - 16：Ac引起较弱的EAD反应。进一步的单感器记录（SSR）显示，Z9 - 14：Ac和Z7 - 12：Ac分别诱导雄性触角中两种类型（A和B）感器的剂量依赖性活动，而未记录到响应于E7 - 12：Ac和Z11 - 16：Ac的感器。最后，风洞试验表明，Z9 - 14：Ac和Z7 - 12：Ac是测试种群的两个主要性信息素成分。
The fall armyworm Spodoptera frugiperda is a worldwide serious agricultural pest, and recently invaded South China. Sex pheromone can be employed to monitor its population dynamics accurately in the field. However, the pheromone components previously reported by testing different geographic populations and strains are not consistent. On the basis of confirming that the S. frugiperda population from Yunnan Province belonged to the corn strain, we analyzed the potential sex pheromone components in the pheromone gland extracts of females using gas chromatography coupled with electroantennographic detection (GC‐EAD), gas chromatography coupled with mass spectrometry (GC‐MS) and electroantennography (EAG). The results show that (Z)‐9‐tetradecenal acetate (Z9‐14:Ac), (Z)‐11‐hexadecenyl acetate (Z11‐16:Ac), (Z)‐7‐dodecenyl acetate (Z7‐12:Ac) or (E)‐7‐dodecenyl acetate (E7‐12:Ac) with a ratio of 100 : 15.8 : 3.9 induced EAD responses to varying degrees: Z9‐14:Ac elicited a strong EAD response, Z7‐12:Ac or E7‐12:Ac elicited a small but clear EAD response, while Z11‐16:Ac elicited a weak EAD response. Further single sensillum recording (SSR) showed that Z9‐14:Ac and Z7‐12:Ac induced dose‐dependent activities in two types (A and B) of sensilla in male antennae, respectively, while the sensilla in response to E7‐12:Ac and Z11‐16:Ac was not recorded. Finally, wind tunnel tests reveal that Z9‐14:Ac and Z7‐12:Ac are two principal sex pheromone components of the tested population.